TUNNEL GRP 125MM X 900MM X 4MM
Side-Power Thruster Tunnels
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Fiberglass Bow Thruster Tunnels

For Bow Thrusters

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Overview
Tunnel Selection -
The diameter of the tunnel will be determined by the model of bow thruster and its propeller diameter. Tunnel diameter refers to the internal diameter of the tube.

The optimal tunnel length is between 2 and 4 times the tunnel diameter (measuring on the short [lower] side of the installed tunnel).
Tunnels which are too short allow the propeller to cavitate — which decreases performance and makes a lot of noise.
Tunnels which are too long have higher internal friction which reduces thrust. This becomes very noticable when the tunnel length exceeds 6 or 7 times the diameter of the tunnel.

Tunnel Installation Tips - The tunnel should be placed as deep as possible so the propeller does not draw air from the surface - which will completely eliminate the thrust. Additionally, the deeper the prop, the greater the water pressure on the blades - which maximizes the efficiency of the propeller.
Generally the top of the tunnel should be a minimum of 1/2 x the tunnel diameter below the waterline. This is an absolute minimum and we recommend that it be at least 3/4 x tunnel diameter below the waterline. An even better distance would be 1 x tunnel diameter below the waterline.
Once you get the top of the tunnel 1 foot (30-35 cm) below the surface, other factors should be considered more important - for example, moving the thruster further forward to get better boat turning leverage.

Click here for an excellent, illustrated guide for selecting and installing bow thruster tunnels. This guide also includes many worthwhile installation tips for optimizing your (expensive) bow thruster's performance.
 
PRODUCT DETAILS TABLE WITH OPTIONS AND PRICING
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Sku#Item IDSide-Power#AvailabilityDescriptionUOMYour PriceQTY
206720SIP SM5001 SM5001Loading...4.92" Fiberglass Bow Thruster Tunnel - 4.92" x 24" x 0.157" (125 x 600 x 4mm) for SE30, SE40Loading...
152742SIP SM5002 SM5002Loading...4.92" Fiberglass Bow Thruster Tunnel - 4.92" x 35-3/8" x 0.157" (125 x 900 x 4mm) for SE30, SE40Loading...
189123SIP SM8002 SM8002Loading...7.28" Fiberglass Bow Thruster Tunnel - 7.28" x 39-3/8" x 0.157" (185 x 1000 x 4mm) for SE60Loading...
137893SIP SM9010 SM9010Loading...7.28" Fiberglass Bow Thruster Tunnel - 7.28" x 39-3/8" x 0.236" (185 x 1000 x 6mm) for SE80, SE100, SH100Loading...
452066SIP SM8003 SM8003Loading...7.28" Fiberglass Bow Thruster Tunnel - 7.28" x 49.2" x 0.157" (185 x 1250 x 4mm) for SE60Loading...
147259SIP SM9003 SM9003Loading...7.28" Fiberglass Bow Thruster Tunnel - 7.28" x 49-1/4" x 1/4" (185 x 1250 x 6mm) for SE80, SE100, SH100Loading...
179741SIP SM8015 SM8015Loading...7.28" Fiberglass Bow Thruster Tunnel - 7.28" x 59" x 0.157" (185 x 1500 x 4mm) for SE60Loading...
147440SIP SM9015 SM9015Loading...7.28" Fiberglass Bow Thruster Tunnel - 7.28" x 59" x 0.236" (185 x 1500 x 6mm) for SE80, SE100, SH1100Loading...
159056SIP SM9025 SM9025Loading...7.28" Fiberglass Bow Thruster Tunnel - 7.28" x 98-1/2" x 0.236" (185 x 2500 x 6mm) for SE80, SE100, SH100Loading...
209022SIP SM12010 SM12010Loading...8.46" Fiberglass Bow Thruster Tunnel - 8.46" x 39.4" x 15/64" (215 x 1000 x 6mm) for SE120, SE150Loading...
209023SIP SM12012 SM12012Loading...8.46" Fiberglass Bow Thruster Tunnel - 8.46" x 49.2" x 15/64" (215 x 1250 x 6mm) for SE120, SE150Loading...
438700SIP SM12015 SM12015Loading...8.46" Fiberglass Bow Thruster Tunnel - 8.46" x 59.1" x 0.236" (215 x 1500 x 6mm) for SE120, SE150, SH160Loading...
377040SIP SM10010 SM10010Loading...9.84" Fiberglass Bow Thruster Tunnel - 9.84" x 39.4" x 0.276" (250 x 1000 x 7mm) for SE130, SE170, SE210, SH240Loading...
214596SIP SM10045 SM10045Loading...9.84" Fiberglass Bow Thruster Tunnel - 9.84" x 49.2" x 0.276" (250 x 1250 x 7mm) for SE130, SE170, SE210, SH240Loading...
431298SIP SM10018 SM10018Loading...9.84" Fiberglass Bow Thruster Tunnel - 9.84" x 68.9" x 0.276" (250 x 1750 x 7mm) for SE130, SE170, SE210, SH240Loading...
202736SIP SM10020 SM10020Loading...9.84" Fiberglass Bow Thruster Tunnel - 9.84" x 78-3/4" x 9/32" (250 x 2000 x 7mm) for SE130, SE170, SE210, SH240Loading...
184042SIP SM10055 SM10055Loading...9.84" Fiberglass Bow Thruster Tunnel - 9.84" x 98-1/2" x 9/32" (250 x 2500 x 7mm) for SE130, SE170, SE210, SH240Loading...
157916SIP SM13015 SM13015Loading...11.81" Fiberglass Bow Thruster Tunnel - 11.81" x 59" x 0.394" (300 x 1500 x 10mm) for SE210, SE240, SE285, SH300Loading...
452630SIP SM13020 SM13020Loading...11.81" Fiberglass Bow Thruster Tunnel - 11.81" x 78.74" x 0.394" (300 x 2000 x 10mm) for 200TC32, 220TC, 240TC, 285TC, 300HYDLoading...
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